DIRECTV HR21700 User Guide - Page 91

About High-Definition

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About High-Definition This section describes HD, and how it differs from regular TV, including helpful information about highdefinition and your DIRECTV Plus HD DVR. Types of TV Broadcasts Analog TV is the type of TV broadcast you may be most familiar with. If you have ever received broadcasts via a standard off-air antenna, you received analog TV; most broadcasts from local cable companies are analog as well. Digital TV is a newer system for broadcasting TV signals delivering higher quality audio and video. "Digital TV" refers to a television that can receive and display digital images. Following are terms you might see used regarding Digital TV broadcasts. Although your DIRECTV Plus HD DVR is a "true" HD receiver, the type of TV or monitor you plug it into (SD, ED, or HD) can affect the resolution of the TV picture you see. See "Resolution and Interlacing" on page 81, for an explanation of display resolutions.  SD (standard definition) is digital TV that offers a picture quality that is better than older analog televisions. SDTV displays images at a resolution of 480i.  ED (enhanced definition) is digital TV that can display a higher resolution picture than SDTV. An EDTV can display at 480i or 480p.  HD (high definition) is digital TV that can provide the highest quality picture, at resolutions 1080i, 720p, 480p, or 480i. TIP You can find additional information and the latest updates at directv.com 80

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80
About High-Definition
This section describes HD, and how it differs from regular TV, including helpful information about
high-
definition and your DIRECTV Plus HD DVR.
Types of TV Broadcasts
Analog TV
is the type of TV broadcast you may be most familiar with. If you have ever received broad-
casts via a standard off-air antenna, you received analog TV; most broadcasts from local cable companies
are analog as well.
Digital TV
is a newer system for broadcasting TV signals delivering higher quality audio and video.
“Digital TV” refers to a television that can receive and display digital images. Following are terms you
might see used regarding Digital TV broadcasts. Although your DIRECTV Plus HD DVR is a “true” HD
receiver, the type of TV or monitor you plug it into (SD, ED, or HD) can affect the
resolution of the TV
picture you see. See “Resolution and
Interlacing” on page 81, for an explanation of display resolutions.
SD
±
(standard definition) is digital TV that offers a picture quality that is better than older analog
televisions.
SDTV displays images at a
resolution of 480i.
ED
±
(enhanced definition) is digital TV that can display a higher
resolution picture than
SDTV. An
EDTV can display at 480i or 480p.
HD
±
(high definition) is digital TV that can provide the highest quality picture, at resolutions 1080i,
720p, 480p, or 480i.
TIP
You can find additional
information and the latest
updates at directv.com